Our Founders
Meet the dedicated individuals leading the S|L Foundation’s mission to serve underserved communities.
The S|L Foundation was established by three passionate individuals committed to making a meaningful difference in the lives of those in need. Together, they bring expertise in law, medicine, and ministry to serve communities both at home and abroad.
John C. Sullivan, JD
Attorney & Co-Founder
John represents clients in complex appellate and trial court litigation, including class actions, commercial disputes, administrative actions, employment matters, and investigations.
He has argued numerous cases in federal courts of appeals throughout the U.S. and the Texas Supreme Court. Before founding S|L Law, John served as Assistant Solicitor General for the State of Texas. He is also a veteran of one of the world’s largest law firms, where he focused on appellate litigation, agency matters, and government relations.
A summa cum laude graduate of the Notre Dame law school, John earned the Farabaugh Prize for high scholarship in law and was the top student in the Program of Law, Ethics, and Public Policy. He was also the executive editor (deputy editor-in-chief) of the Notre Dame Law Review. After law school, John clerked for Chief Judge Edith H. Jones of the United States Court of Appeals for the Fifth Circuit. He is also President-Emeritus of the Dallas Chapter of the Federalist Society.
Education
- University of Notre Dame Law School, J.D.
- Biola University, M.A.
- Hardin-Simmons University, B.A.
- Southwestern Assemblies of God University, B.S.
Prior Associations
- Attorney General of Texas, Assistant Solicitor General
- Morgan, Lewis & Bockius LLP
Contact
The Woodlands, TX
Matthew Sullivan, DO
Emergency Medicine Physician & Co-Founder
Matthew is a practicing Emergency Medicine physician based in Houston, Texas. He currently serves as the Assistant Emergency Medicine Chief for HCA Houston Healthcare Conroe, a Level II Trauma Center with comprehensive stroke and cardiac care capabilities.
A summa cum laude graduate of Oklahoma State University College of Osteopathic Medicine, Dr. Sullivan went on to complete his Emergency Medicine residency at John Peter Smith Hospital in Fort Worth, Texas, where he was honored to serve as Chief Resident.
Before entering medicine, Dr. Sullivan earned a Master’s Degree in Theological Studies from Southwestern Assemblies of God University and spent a decade in pastoral ministry serving underserved communities. During this time, he founded free medical clinics for homeless populations, developed food pantry and delivery programs, and created educational workshops for at-risk teens in alternative learning environments.
Education
- Oklahoma State University College of Medicine, D.O.
- Southwestern Assemblies of God University, Master of Theology
Current Position
Assistant Site Medical Director,
HCA Houston Healthcare Conroe Level II Trauma Center
Zachary Sullivan, DO
Child & Adolescent Psychiatrist & Co-Founder
Zach completed his medical training at Oklahoma State University. He completed both a general psychiatry residency and fellowship training in Child and Adolescent psychiatry at the University of Texas at Houston.
Zach is currently practicing medicine at Serenity Mental Health Center in Fort Worth. Prior to this he was the chief medical officer of Parkside Psychiatric hospital in Tulsa Oklahoma.
Education
- Oklahoma State University, DO
- University of Texas at Houston, Residency & Fellowship
Current Position
Doctor of Child and Adolescent Psychiatry, Serenity Mental Health Center, Fort Worth, TX
Get in Touch with Our Team
Have questions about our mission or want to learn how you can contribute? We’d love to hear from you.